Sectional steam-generator



D. RENSHAW. Sectional Steam Generator.

No. 231,194. Patented Aug. 17,1880.

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N. PETERS. PKOTOLITMDGRAF ER.

UNITED STATES PATENT OFFICE.

DAVID RENSHAW, OF OOHASSET, ASSIGNOR TO BISBEE, ENDIUOTT & OO.,

- OF CHELSEA, MASSACHUSETTS.

SECTIONAL STEAM-GENERATOR.

SPECIFICATION forming part of Letters Patent No. 231,194, dated August17, 1880.

Application filed November 28, 1879.

To all whom it may concern:

Be it known that I, DAVID RENSHAW, of Oohasset, in the county of Norfolkand State of Massachusetts, have invented certain new 5 and usefulImprovements in Sectional Steam- Generators, which improvements arefully set forth in the following specication and accompanying drawing.

My invention consists in an improved form 1o of such sectionalsteam-generators as extend around and inclose the tire-box and ash-pit,and it is an improvement upon the boiler patented to George B. N. Tower,J annary 7, 1879, No. 211,118, in this respect, viz., that it hasvertical side pipes and horizontal upper pipes,

the vertical and horizontal pipes being connected by curvedfrusto-conical pipes, as shown in said patent 5 but instead of thesections oc cupyin g only one side of the rire-chamber they zo areplaced on each side of said chamber, the

upper water-bodies being connected and forming one continuousWater-body, from which the steam is disengaged, While the lower ends ofsuch sections are extended and united, thus making complete sectionsinclosing the rebox and ash-pit, and surrounding them with a water-body,the advantages of which are well known.

In the drawing, the vertical pipes on the 3o outside of the sections aremarked A, the upper horizontal pipes, A', and the lower horizontalpipes, A2. E is a steam-drum, and H the feed and blow-oft' pipe. Brepresents the re-chamber, C the ash-pit, and D the gratebars.

The pipes A, A', and A2 are connected by curved corners, as shown, andare of a uniform width throughout, in order that they may come incontact with one another and lnake a wall to the boiler which willnecessitate very little brick-work to complete. The sides ofthe pipes A,the whole surfaces of the frustoconical pipes G, and the bottom ot' thepipe A are exposed to the direct action of the lirein a largetire-chamber, which must produce excellent results in the evaporation ofwater and consequent production of steam.

What I cla-im as my invention is- In a sectional boiler, the combinationof the vertical side pipes, A, horizontal upper pipes, A', curvedfrusto-conical pipes G, connecting pipes A and A', and lower horizontalpipes, A2, said pipes A, Al and A2 inclosing a firechamber and ash-pit,all as described, and for the purpose specified.

DAVID RENSHAW.

Witnesses:

CEAS. F. SLEEPEE, A. S. BITHEs.

